QUINCY – City police have stepped up patrols near the North Quincy MBTA station and have asked commuters to be vigilant after a woman reported a man attacked her as she walked home from an early-morning train over the weekend.

A young woman told police she was walking on Botolph Street, about a half-mile from the North Quincy T station, at about 1:15 a.m. Saturday when a man came up behind her, tried to put his hand over her mouth and told her to keep quiet. The woman yelled and was able to run away without injury, police Capt. John Dougan said.

The alleged victim was unable to provide a detailed description of her assailant except that he was about 5 feet, 10 inches tall.

The woman had just gotten off a train and was walking by herself when the attack happened, Dougan said.

Police have responded by increasing their presence near the North Quincy station, off East Squantum Street between Newport Avenue and Hancock Street.

“Just be aware of your surroundings at the MBTA stations,” Dougan said. “If you see anything suspicious, contact police.”

In February, police said a man jumped out of bushes and tried to steal the purse of a woman walking from the Wollaston T station. The woman held on to the bag and was knocked down and dragged a few feet in the struggle before the assailant ran away.

Dougan said he couldn’t speculate whether the two incidents were related because police don’t have a description of Saturday’s attacker.

In March, police arrested a Boston man who allegedly followed a woman to her car in the Quincy Adams T garage and tried to open her passenger-side door.